Question

Factorise :
1. 25a^2 - 9b^2​

Answer 1

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$\longmapsto \sf {25a}^{2} - {9b}^{2}$

$\longmapsto \sf {(5a)}^{2} - {(3b)}^{2}$

$\longmapsto \sf (5a + 3b)(5a - 3b)$

Identity Used :-

$\longmapsto \sf {a}^{2} - {b}^{2} = (a + b)(a - b)$

Answer 2

Answer:

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